Isixhobo sokuqhuma iplagi-in-proof inokubonelela ngesiqalo sokumisa kunye nokuguqulwa kokulawulwa kwemoto kwiindawo ezinobungozi, ezifana noshishino lweekhemikhali, isikhululo segesi yepetroli, i-petroleum, imboni yezempi kunye nezinye iindawo ezinomswakama ophezulu, ukushisa okuphezulu kunye nothuli.